Spritz Depot
dmg2img
Converts Apple DMG files to standard HFS+ images
Also on HaikuPorts.
dmg2img
Description
dmg2img is a command line tool for converting .dmg files, popular on Mac OS X systems, to HFS+ disk images. A companion command-line tool, vfdecrypt, allows to decrypt encrypted Mac OS X disk image files (also known as filevault disk).
Install
Channel stable v1.6.7-4
This app is curated in HaikuPorts. Install it from there, it is already available in HaikuDepot.
pkgman install dmg2img
Download version 1.6.7-4 (x86_64) hpkg
Careful: the file comes from HaikuPorts' own server, but installing it by hand is not the way in. It is pkgman that resolves the dependencies an .hpkg does not carry with it, and a package installed on its own may simply not run. Use the pkgman command above, unless you know exactly why you want the file.